Certified Rhythm Analysis Technician (CRAT) Practice Exam

Question: 1 / 400

How many seconds does each small box on a standard ECG grid represent?

0.04 seconds

Each small box on a standard ECG grid represents 0.04 seconds. This is derived from the standard settings of the paper speed for ECGs, which is typically 25 millimeters per second. The grid is designed so that each small box measures 1 millimeter in height and width. Since the paper moves at this speed, the time it takes for the paper to move 1 millimeter is 1/25 of a second, equating to 0.04 seconds.

Understanding this time representation is crucial for interpreting the intervals and segments in an ECG tracing. For example, if you are examining the PR interval or the QT interval, knowing the duration of each small box helps in gauging whether these intervals fall within the normal ranges. This fundamental knowledge aids healthcare professionals in diagnosing potential cardiac issues accurately based on the rhythm and timing depicted in the ECG.

Get further explanation with Examzify DeepDiveBeta

0.08 seconds

0.10 seconds

0.12 seconds

Next Question

Report this question

Download Certified Rhythm Analysis Technician (CRAT) Practice Exam PDF Study Guide
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy